Portable exoskeleton



FIG. 1 is a top, right perspective view of a portable exoskeleton embodying the new design;

FIG. 2 is a top, rear perspective view thereof;

FIG. 3 is a bottom, right perspective view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a left view thereof;

FIG. 8 is a top view thereof; and,

FIG. 9 is a bottom view thereof.

FIGS. 1-9 show portion of the portable exoskeleton treatment device in broken lines. The broken line portions form no part of the claimed design. 

CLAIM The ornamental design for a portable exoskeleton, as shown and described. 